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Short-Term Borrowings (Details Textual) (USD $)	1 Months Ended	12 Months Ended		12 Months Ended
	Sep. 30, 2005	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Retail Repurchase Agreements [Member]	Dec. 31, 2011 Retail Repurchase Agreements [Member]	Dec. 31, 2012 Brokerage Repurchase Agreements [Member]	Dec. 31, 2011 Brokerage Repurchase Agreements [Member]
Short-Term Borrowings (Textual)
Securities sold under repurchase agreements				$ 10,333,000	$ 13,779,000		$ 5,000,000
Maximum amount of outstanding agreements at any month-end				15,000,000	15,200,000	5,000,000	35,000,000
Monthly average of such agreements totaled				12,600,000	13,200,000	2,600,000	18,100,000
Short-term borrowings mature	September 7, 2030, at the option of the Company: on or after September 7, 2020 at par; or on or after September 7, 2010 at a premium.	Between 2013 and 2015.		Within one month.	Within one month.
Debt instrument maturity date						Jul. 10, 2012
Federal funds lines in state bank		11,500,000	11,500,000
Federal funds lines in state bank drawn upon		$ 0	$ 0

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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-Publisher SEC

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Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

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The carrying value as of the balance sheet date of securities that an institution sells and agrees to repurchase (the identical or substantially the same securities) as a seller-borrower at a specified date for a specified price, also known as a repurchase agreement, or repo. Most repos involve obligations of the federal government or its agencies, but other financial instruments, such as commercial paper, banker's acceptances, and negotiable certificates of deposit, are sometimes used in repos.

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period.

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